Ring size guide
How to Measure Your Ring Size
1. Measure Your Finger using a Piece of String or Paper Strip
Cut a thin strip of paper or use a string. Wrap it around the base of your finger where the ring would sit. Mark where the paper or string overlaps, forming a complete circle. Measure the length from the end of the string or paper to the marked point in millimeters. This is the circumference.
2. Measure the Diameter
If you already have a well-fitting ring, you can measure it's inner diameter directly using a ruler or caliper. The diameter is the straight-line distance across the center of the ring, from one side to the other.
3. Choose a Comfortable Fit
Remember that finger sizes can vary slightly throughout the day, so it’s best to measure at the end of the day when your fingers are slightly larger. The ring should comfortably slide over your knuckle and fit snugly without being too tight.
Ring Size Chart (International)
This updated chart includes both diameter (mm) and circumference (mm) for each size. You can use either measurement to determine your ring size.
Circumference (mm) |
Diameter (mm) |
US/Canada |
UK/Australia |
European (EU) |
Japan |
|---|---|---|---|---|---|
| 44.2 | 14.0 | 3 | F | 44 | 4 |
| 45.5 | 14.5 | 3 1/2 | G | 45.5 | 5 1/2 |
| 46.8 | 15.0 | 4 | H | 46.5 | 7 |
| 48.0 | 15.3 | 4 1/2 | I | 48 | 8 |
| 49.3 | 15.7 | 5 | J 1/2 | 49 | 9 |
| 50.6 | 16.0 | 5 1/2 | K 1/2 | 50.5 | 10 1/2 |
| 51.9 | 16.5 | 6 | L 1/2 | 52 | 12 |
| 53.1 | 16.9 | 6 1/2 | M 1/2 | 53 | 13 |
| 54.4 | 17.3 | 7 | N 1/2 | 54 | 14 |
| 55.7 | 17.8 | 7 1/2 | O 1/2 | 55.5 | 15 |
| 56.9 | 18.1 | 8 | P 1/2 | 57 | 16 |
| 58.2 | 18.5 | 8 1/2 | Q 1/2 | 58 | 17 |
| 59.5 | 18.9 | 9 | R 1/2 | 59.5 | 18 |
| 60.8 | 19.3 | 9 1/2 | S 1/2 | 61 | 19 |
| 62.1 | 19.6 | 10 | T 1/2 | 62 | 20 |
| 63.4 | 20.0 | 10 1/2 | U 1/2 | 63 | 22 |
| 64.7 | 20.4 | 11 | V 1/2 | 64.5 | 23 |
| 66.0 | 20.8 | 11 1/2 | W 1/2 | 66 | 24 |
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